2 * Copyright (c) 2001-2002 by David Brownell
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __LINUX_EHCI_HCD_H
20 #define __LINUX_EHCI_HCD_H
22 /* definitions used for the EHCI driver */
25 * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
26 * __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on
27 * the host controller implementation.
29 * To facilitate the strongest possible byte-order checking from "sparse"
30 * and so on, we use __leXX unless that's not practical.
32 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
33 typedef __u32 __bitwise __hc32;
34 typedef __u16 __bitwise __hc16;
40 /* statistics can be kept for tuning/monitoring */
41 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
50 unsigned long lost_iaa;
52 /* termination of urbs from core */
53 unsigned long complete;
58 * Scheduling and budgeting information for periodic transfers, for both
59 * high-speed devices and full/low-speed devices lying behind a TT.
61 struct ehci_per_sched {
62 struct usb_device *udev; /* access to the TT */
63 struct usb_host_endpoint *ep;
64 u16 tt_usecs; /* time on the FS/LS bus */
65 u16 period; /* actual period in frames */
66 u16 phase; /* actual phase, frame part */
67 u8 phase_uf; /* uframe part of the phase */
68 u8 usecs, c_usecs; /* times on the HS bus */
70 #define NO_FRAME 29999 /* frame not assigned yet */
72 /* ehci_hcd->lock guards shared data against other CPUs:
73 * ehci_hcd: async, unlink, periodic (and shadow), ...
74 * usb_host_endpoint: hcpriv
75 * ehci_qh: qh_next, qtd_list
78 * Also, hold this lock when talking to HC registers or
79 * when updating hw_* fields in shared qh/qtd/... structures.
82 #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
85 * ehci_rh_state values of EHCI_RH_RUNNING or above mean that the
86 * controller may be doing DMA. Lower values mean there's no DMA.
96 * Timer events, ordered by increasing delay length.
97 * Always update event_delays_ns[] and event_handlers[] (defined in
98 * ehci-timer.c) in parallel with this list.
100 enum ehci_hrtimer_event {
101 EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */
102 EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */
103 EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */
104 EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */
105 EHCI_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */
106 EHCI_HRTIMER_START_UNLINK_INTR, /* Unlink empty interrupt QHs */
107 EHCI_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */
108 EHCI_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */
109 EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */
110 EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */
111 EHCI_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */
112 EHCI_HRTIMER_NUM_EVENTS /* Must come last */
114 #define EHCI_HRTIMER_NO_EVENT 99
116 struct ehci_hcd { /* one per controller */
118 enum ehci_hrtimer_event next_hrtimer_event;
119 unsigned enabled_hrtimer_events;
120 ktime_t hr_timeouts[EHCI_HRTIMER_NUM_EVENTS];
121 struct hrtimer hrtimer;
127 /* glue to PCI and HCD framework */
128 struct ehci_caps __iomem *caps;
129 struct ehci_regs __iomem *regs;
130 struct ehci_dbg_port __iomem *debug;
132 __u32 hcs_params; /* cached register copy */
134 enum ehci_rh_state rh_state;
136 /* general schedule support */
139 bool intr_unlinking:1;
140 bool iaa_in_progress:1;
141 bool async_unlinking:1;
143 struct ehci_qh *qh_scan_next;
145 /* async schedule support */
146 struct ehci_qh *async;
147 struct ehci_qh *dummy; /* For AMD quirk use */
148 struct list_head async_unlink;
149 struct list_head async_idle;
150 unsigned async_unlink_cycle;
151 unsigned async_count; /* async activity count */
153 /* periodic schedule support */
154 #define DEFAULT_I_TDPS 1024 /* some HCs can do less */
155 unsigned periodic_size;
156 __hc32 *periodic; /* hw periodic table */
157 dma_addr_t periodic_dma;
158 struct list_head intr_qh_list;
159 unsigned i_thresh; /* uframes HC might cache */
161 union ehci_shadow *pshadow; /* mirror hw periodic table */
162 struct list_head intr_unlink_wait;
163 struct list_head intr_unlink;
164 unsigned intr_unlink_wait_cycle;
165 unsigned intr_unlink_cycle;
166 unsigned now_frame; /* frame from HC hardware */
167 unsigned last_iso_frame; /* last frame scanned for iso */
168 unsigned intr_count; /* intr activity count */
169 unsigned isoc_count; /* isoc activity count */
170 unsigned periodic_count; /* periodic activity count */
171 unsigned uframe_periodic_max; /* max periodic time per uframe */
174 /* list of itds & sitds completed while now_frame was still active */
175 struct list_head cached_itd_list;
176 struct ehci_itd *last_itd_to_free;
177 struct list_head cached_sitd_list;
178 struct ehci_sitd *last_sitd_to_free;
180 /* per root hub port */
181 unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
183 /* bit vectors (one bit per port) */
184 unsigned long bus_suspended; /* which ports were
185 already suspended at the start of a bus suspend */
186 unsigned long companion_ports; /* which ports are
187 dedicated to the companion controller */
188 unsigned long owned_ports; /* which ports are
189 owned by the companion during a bus suspend */
190 unsigned long port_c_suspend; /* which ports have
191 the change-suspend feature turned on */
192 unsigned long suspended_ports; /* which ports are
194 unsigned long resuming_ports; /* which ports have
197 /* per-HC memory pools (could be per-bus, but ...) */
198 struct dma_pool *qh_pool; /* qh per active urb */
199 struct dma_pool *qtd_pool; /* one or more per qh */
200 struct dma_pool *itd_pool; /* itd per iso urb */
201 struct dma_pool *sitd_pool; /* sitd per split iso urb */
203 unsigned random_frame;
204 unsigned long next_statechange;
205 ktime_t last_periodic_enable;
209 unsigned no_selective_suspend:1;
210 unsigned has_fsl_port_bug:1; /* FreeScale */
211 unsigned big_endian_mmio:1;
212 unsigned big_endian_desc:1;
213 unsigned big_endian_capbase:1;
214 unsigned has_amcc_usb23:1;
215 unsigned need_io_watchdog:1;
216 unsigned amd_pll_fix:1;
217 unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/
218 unsigned has_synopsys_hc_bug:1; /* Synopsys HC */
219 unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */
220 unsigned need_oc_pp_cycle:1; /* MPC834X port power */
222 /* required for usb32 quirk */
223 #define OHCI_CTRL_HCFS (3 << 6)
224 #define OHCI_USB_OPER (2 << 6)
225 #define OHCI_USB_SUSPEND (3 << 6)
227 #define OHCI_HCCTRL_OFFSET 0x4
228 #define OHCI_HCCTRL_LEN 0x4
229 __hc32 *ohci_hcctrl_reg;
230 unsigned has_hostpc:1;
231 unsigned has_tdi_phy_lpm:1;
232 unsigned has_ppcd:1; /* support per-port change bits */
233 u8 sbrn; /* packed release number */
237 struct ehci_stats stats;
238 # define COUNT(x) do { (x)++; } while (0)
240 # define COUNT(x) do {} while (0)
244 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
245 struct dentry *debug_dir;
248 /* platform-specific data -- must come last */
249 unsigned long priv[0] __aligned(sizeof(s64));
252 /* convert between an HCD pointer and the corresponding EHCI_HCD */
253 static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
255 return (struct ehci_hcd *) (hcd->hcd_priv);
257 static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
259 return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
262 /*-------------------------------------------------------------------------*/
264 #include <linux/usb/ehci_def.h>
266 /*-------------------------------------------------------------------------*/
268 #define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
271 * EHCI Specification 0.95 Section 3.5
272 * QTD: describe data transfer components (buffer, direction, ...)
273 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
275 * These are associated only with "QH" (Queue Head) structures,
276 * used with control, bulk, and interrupt transfers.
279 /* first part defined by EHCI spec */
280 __hc32 hw_next; /* see EHCI 3.5.1 */
281 __hc32 hw_alt_next; /* see EHCI 3.5.2 */
282 __hc32 hw_token; /* see EHCI 3.5.3 */
283 #define QTD_TOGGLE (1 << 31) /* data toggle */
284 #define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
285 #define QTD_IOC (1 << 15) /* interrupt on complete */
286 #define QTD_CERR(tok) (((tok)>>10) & 0x3)
287 #define QTD_PID(tok) (((tok)>>8) & 0x3)
288 #define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
289 #define QTD_STS_HALT (1 << 6) /* halted on error */
290 #define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
291 #define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
292 #define QTD_STS_XACT (1 << 3) /* device gave illegal response */
293 #define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
294 #define QTD_STS_STS (1 << 1) /* split transaction state */
295 #define QTD_STS_PING (1 << 0) /* issue PING? */
297 #define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
298 #define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
299 #define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
301 __hc32 hw_buf [5]; /* see EHCI 3.5.4 */
302 __hc32 hw_buf_hi [5]; /* Appendix B */
304 /* the rest is HCD-private */
305 dma_addr_t qtd_dma; /* qtd address */
306 struct list_head qtd_list; /* sw qtd list */
307 struct urb *urb; /* qtd's urb */
308 size_t length; /* length of buffer */
309 } __attribute__ ((aligned (32)));
311 /* mask NakCnt+T in qh->hw_alt_next */
312 #define QTD_MASK(ehci) cpu_to_hc32 (ehci, ~0x1f)
314 #define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)
316 /*-------------------------------------------------------------------------*/
318 /* type tag from {qh,itd,sitd,fstn}->hw_next */
319 #define Q_NEXT_TYPE(ehci,dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
322 * Now the following defines are not converted using the
323 * cpu_to_le32() macro anymore, since we have to support
324 * "dynamic" switching between be and le support, so that the driver
325 * can be used on one system with SoC EHCI controller using big-endian
326 * descriptors as well as a normal little-endian PCI EHCI controller.
328 /* values for that type tag */
329 #define Q_TYPE_ITD (0 << 1)
330 #define Q_TYPE_QH (1 << 1)
331 #define Q_TYPE_SITD (2 << 1)
332 #define Q_TYPE_FSTN (3 << 1)
334 /* next async queue entry, or pointer to interrupt/periodic QH */
335 #define QH_NEXT(ehci,dma) (cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH))
337 /* for periodic/async schedules and qtd lists, mark end of list */
338 #define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
341 * Entries in periodic shadow table are pointers to one of four kinds
342 * of data structure. That's dictated by the hardware; a type tag is
343 * encoded in the low bits of the hardware's periodic schedule. Use
344 * Q_NEXT_TYPE to get the tag.
346 * For entries in the async schedule, the type tag always says "qh".
349 struct ehci_qh *qh; /* Q_TYPE_QH */
350 struct ehci_itd *itd; /* Q_TYPE_ITD */
351 struct ehci_sitd *sitd; /* Q_TYPE_SITD */
352 struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
353 __hc32 *hw_next; /* (all types) */
357 /*-------------------------------------------------------------------------*/
360 * EHCI Specification 0.95 Section 3.6
361 * QH: describes control/bulk/interrupt endpoints
362 * See Fig 3-7 "Queue Head Structure Layout".
364 * These appear in both the async and (for interrupt) periodic schedules.
367 /* first part defined by EHCI spec */
369 __hc32 hw_next; /* see EHCI 3.6.1 */
370 __hc32 hw_info1; /* see EHCI 3.6.2 */
371 #define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
372 #define QH_HEAD (1 << 15) /* Head of async reclamation list */
373 #define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
374 #define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
375 #define QH_LOW_SPEED (1 << 12)
376 #define QH_FULL_SPEED (0 << 12)
377 #define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
378 __hc32 hw_info2; /* see EHCI 3.6.2 */
379 #define QH_SMASK 0x000000ff
380 #define QH_CMASK 0x0000ff00
381 #define QH_HUBADDR 0x007f0000
382 #define QH_HUBPORT 0x3f800000
383 #define QH_MULT 0xc0000000
384 __hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
386 /* qtd overlay (hardware parts of a struct ehci_qtd) */
391 __hc32 hw_buf_hi [5];
392 } __attribute__ ((aligned(32)));
395 struct ehci_qh_hw *hw; /* Must come first */
396 /* the rest is HCD-private */
397 dma_addr_t qh_dma; /* address of qh */
398 union ehci_shadow qh_next; /* ptr to qh; or periodic */
399 struct list_head qtd_list; /* sw qtd list */
400 struct list_head intr_node; /* list of intr QHs */
401 struct ehci_qtd *dummy;
402 struct list_head unlink_node;
403 struct ehci_per_sched ps; /* scheduling info */
405 unsigned unlink_cycle;
408 #define QH_STATE_LINKED 1 /* HC sees this */
409 #define QH_STATE_UNLINK 2 /* HC may still see this */
410 #define QH_STATE_IDLE 3 /* HC doesn't see this */
411 #define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
412 #define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
414 u8 xacterrs; /* XactErr retry counter */
415 #define QH_XACTERR_MAX 32 /* XactErr retry limit */
417 u8 gap_uf; /* uframes split/csplit gap */
419 unsigned is_out:1; /* bulk or intr OUT */
420 unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
421 unsigned dequeue_during_giveback:1;
422 unsigned exception:1; /* got a fault, or an unlink
426 /*-------------------------------------------------------------------------*/
428 /* description of one iso transaction (up to 3 KB data if highspeed) */
429 struct ehci_iso_packet {
430 /* These will be copied to iTD when scheduling */
431 u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
432 __hc32 transaction; /* itd->hw_transaction[i] |= */
433 u8 cross; /* buf crosses pages */
434 /* for full speed OUT splits */
438 /* temporary schedule data for packets from iso urbs (both speeds)
439 * each packet is one logical usb transaction to the device (not TT),
440 * beginning at stream->next_uframe
442 struct ehci_iso_sched {
443 struct list_head td_list;
445 unsigned first_packet;
446 struct ehci_iso_packet packet [0];
450 * ehci_iso_stream - groups all (s)itds for this endpoint.
451 * acts like a qh would, if EHCI had them for ISO.
453 struct ehci_iso_stream {
454 /* first field matches ehci_hq, but is NULL */
455 struct ehci_qh_hw *hw;
459 struct list_head td_list; /* queued itds/sitds */
460 struct list_head free_list; /* list of unused itds/sitds */
462 /* output of (re)scheduling */
463 struct ehci_per_sched ps; /* scheduling info */
464 unsigned next_uframe;
467 /* the rest is derived from the endpoint descriptor,
468 * including the extra info for hw_bufp[0..2]
470 u16 uperiod; /* period in uframes */
475 /* This is used to initialize iTD's hw_bufp fields */
480 /* this is used to initialize sITD's tt info */
484 /*-------------------------------------------------------------------------*/
487 * EHCI Specification 0.95 Section 3.3
488 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
490 * Schedule records for high speed iso xfers
493 /* first part defined by EHCI spec */
494 __hc32 hw_next; /* see EHCI 3.3.1 */
495 __hc32 hw_transaction [8]; /* see EHCI 3.3.2 */
496 #define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
497 #define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
498 #define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
499 #define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
500 #define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
501 #define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
503 #define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
505 __hc32 hw_bufp [7]; /* see EHCI 3.3.3 */
506 __hc32 hw_bufp_hi [7]; /* Appendix B */
508 /* the rest is HCD-private */
509 dma_addr_t itd_dma; /* for this itd */
510 union ehci_shadow itd_next; /* ptr to periodic q entry */
513 struct ehci_iso_stream *stream; /* endpoint's queue */
514 struct list_head itd_list; /* list of stream's itds */
516 /* any/all hw_transactions here may be used by that urb */
517 unsigned frame; /* where scheduled */
519 unsigned index[8]; /* in urb->iso_frame_desc */
520 } __attribute__ ((aligned (32)));
522 /*-------------------------------------------------------------------------*/
525 * EHCI Specification 0.95 Section 3.4
526 * siTD, aka split-transaction isochronous Transfer Descriptor
527 * ... describe full speed iso xfers through TT in hubs
528 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
531 /* first part defined by EHCI spec */
533 /* uses bit field macros above - see EHCI 0.95 Table 3-8 */
534 __hc32 hw_fullspeed_ep; /* EHCI table 3-9 */
535 __hc32 hw_uframe; /* EHCI table 3-10 */
536 __hc32 hw_results; /* EHCI table 3-11 */
537 #define SITD_IOC (1 << 31) /* interrupt on completion */
538 #define SITD_PAGE (1 << 30) /* buffer 0/1 */
539 #define SITD_LENGTH(x) (0x3ff & ((x)>>16))
540 #define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
541 #define SITD_STS_ERR (1 << 6) /* error from TT */
542 #define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
543 #define SITD_STS_BABBLE (1 << 4) /* device was babbling */
544 #define SITD_STS_XACT (1 << 3) /* illegal IN response */
545 #define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
546 #define SITD_STS_STS (1 << 1) /* split transaction state */
548 #define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
550 __hc32 hw_buf [2]; /* EHCI table 3-12 */
551 __hc32 hw_backpointer; /* EHCI table 3-13 */
552 __hc32 hw_buf_hi [2]; /* Appendix B */
554 /* the rest is HCD-private */
556 union ehci_shadow sitd_next; /* ptr to periodic q entry */
559 struct ehci_iso_stream *stream; /* endpoint's queue */
560 struct list_head sitd_list; /* list of stream's sitds */
563 } __attribute__ ((aligned (32)));
565 /*-------------------------------------------------------------------------*/
568 * EHCI Specification 0.96 Section 3.7
569 * Periodic Frame Span Traversal Node (FSTN)
571 * Manages split interrupt transactions (using TT) that span frame boundaries
572 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
573 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
574 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
577 __hc32 hw_next; /* any periodic q entry */
578 __hc32 hw_prev; /* qh or EHCI_LIST_END */
580 /* the rest is HCD-private */
582 union ehci_shadow fstn_next; /* ptr to periodic q entry */
583 } __attribute__ ((aligned (32)));
585 /*-------------------------------------------------------------------------*/
587 /* Prepare the PORTSC wakeup flags during controller suspend/resume */
589 #define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
590 ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup);
592 #define ehci_prepare_ports_for_controller_resume(ehci) \
593 ehci_adjust_port_wakeup_flags(ehci, false, false);
595 /*-------------------------------------------------------------------------*/
597 #ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
600 * Some EHCI controllers have a Transaction Translator built into the
601 * root hub. This is a non-standard feature. Each controller will need
602 * to add code to the following inline functions, and call them as
603 * needed (mostly in root hub code).
606 #define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
608 /* Returns the speed of a device attached to a port on the root hub. */
609 static inline unsigned int
610 ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
612 if (ehci_is_TDI(ehci)) {
613 switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
617 return USB_PORT_STAT_LOW_SPEED;
620 return USB_PORT_STAT_HIGH_SPEED;
623 return USB_PORT_STAT_HIGH_SPEED;
628 #define ehci_is_TDI(e) (0)
630 #define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
633 /*-------------------------------------------------------------------------*/
635 #ifdef CONFIG_PPC_83xx
636 /* Some Freescale processors have an erratum in which the TT
637 * port number in the queue head was 0..N-1 instead of 1..N.
639 #define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
641 #define ehci_has_fsl_portno_bug(e) (0)
645 * While most USB host controllers implement their registers in
646 * little-endian format, a minority (celleb companion chip) implement
647 * them in big endian format.
649 * This attempts to support either format at compile time without a
650 * runtime penalty, or both formats with the additional overhead
651 * of checking a flag bit.
653 * ehci_big_endian_capbase is a special quirk for controllers that
654 * implement the HC capability registers as separate registers and not
655 * as fields of a 32-bit register.
658 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
659 #define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
660 #define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
662 #define ehci_big_endian_mmio(e) 0
663 #define ehci_big_endian_capbase(e) 0
667 * Big-endian read/write functions are arch-specific.
668 * Other arches can be added if/when they're needed.
670 #if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
671 #define readl_be(addr) __raw_readl((__force unsigned *)addr)
672 #define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
675 static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
676 __u32 __iomem * regs)
678 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
679 return ehci_big_endian_mmio(ehci) ?
687 static inline void ehci_writel(const struct ehci_hcd *ehci,
688 const unsigned int val, __u32 __iomem *regs)
690 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
691 ehci_big_endian_mmio(ehci) ?
692 writel_be(val, regs) :
700 * On certain ppc-44x SoC there is a HW issue, that could only worked around with
701 * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
702 * Other common bits are dependent on has_amcc_usb23 quirk flag.
705 static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
709 hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS);
711 hc_control |= OHCI_USB_OPER;
713 hc_control |= OHCI_USB_SUSPEND;
715 writel_be(hc_control, ehci->ohci_hcctrl_reg);
716 (void) readl_be(ehci->ohci_hcctrl_reg);
719 static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
723 /*-------------------------------------------------------------------------*/
726 * The AMCC 440EPx not only implements its EHCI registers in big-endian
727 * format, but also its DMA data structures (descriptors).
729 * EHCI controllers accessed through PCI work normally (little-endian
730 * everywhere), so we won't bother supporting a BE-only mode for now.
732 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
733 #define ehci_big_endian_desc(e) ((e)->big_endian_desc)
736 static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
738 return ehci_big_endian_desc(ehci)
739 ? (__force __hc32)cpu_to_be32(x)
740 : (__force __hc32)cpu_to_le32(x);
744 static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
746 return ehci_big_endian_desc(ehci)
747 ? be32_to_cpu((__force __be32)x)
748 : le32_to_cpu((__force __le32)x);
751 static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
753 return ehci_big_endian_desc(ehci)
754 ? be32_to_cpup((__force __be32 *)x)
755 : le32_to_cpup((__force __le32 *)x);
761 static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
763 return cpu_to_le32(x);
767 static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
769 return le32_to_cpu(x);
772 static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
774 return le32_to_cpup(x);
779 /*-------------------------------------------------------------------------*/
781 #define ehci_dbg(ehci, fmt, args...) \
782 dev_dbg(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
783 #define ehci_err(ehci, fmt, args...) \
784 dev_err(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
785 #define ehci_info(ehci, fmt, args...) \
786 dev_info(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
787 #define ehci_warn(ehci, fmt, args...) \
788 dev_warn(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
791 #if !defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
792 #define STUB_DEBUG_FILES
793 #endif /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */
795 /*-------------------------------------------------------------------------*/
797 /* Declarations of things exported for use by ehci platform drivers */
799 struct ehci_driver_overrides {
800 size_t extra_priv_size;
801 int (*reset)(struct usb_hcd *hcd);
804 extern void ehci_init_driver(struct hc_driver *drv,
805 const struct ehci_driver_overrides *over);
806 extern int ehci_setup(struct usb_hcd *hcd);
807 extern int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
808 u32 mask, u32 done, int usec);
811 extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
812 extern int ehci_resume(struct usb_hcd *hcd, bool hibernated);
813 #endif /* CONFIG_PM */
815 #endif /* __LINUX_EHCI_HCD_H */